America as a world power, 1872-1945
MLA
Ferrell, Robert H. America As a World Power, 1872-1945. Documentary History of the United States. Columbia: University of South Carolina Press, 1971
APA, 7th edition
Ferrell, R. H. (1971). America as a world power, 1872-1945. Documentary history of the United States. Columbia: University of South Carolina Press
Chicago, 17th edition
Ferrell, Robert H. America as a world power, 1872-1945. Documentary history of the United States. Columbia: University of South Carolina Press, 1971